Ecumenical Patriarch Arsenios

Ecumenical Patriarch Arsenios (1200-8 July 1263) was the Ecumenical Patriarch of Constantinople from 1255 to 1260, succeeding Ecumenical Patriarch Manuel II and preceding [Ecumenical Patriarch Nicephorus II]] and from 1261 to 1263, succeeding Nicephorus II and preceding Ecumenical Patriarch Basileios III.

Biography
Arsenios was born in 1200 to the House of Autoreianos, a dynasty of Orthodox Christian Greeks. Arsenios was educated at a monastery in Nicaea, and in 1255 he came out of a life of seclusion when Theodore II of Byzantium appointed him as the Patriarch of Nicaea. He shared guardianship of his son John IV of Byzantium with George Muzalon after Theodore's death in 1258, but Michael Palaiologos murdered George Muzalon and Michael became the new regent; in January 1259 Arsenios crowned the two men as co-emperors. In 1261 he became patriarch of Constantinople after Michael reconquered the city, but Arsenios gained a negative opinion of the emperor when he blinded John IV. Arsenios excommunicated the Emperor, but he died in 1263 before the Emperor could depose him. He was succeeded by Ecumenical Patriarch Basileios III.